I’m pleased to announce the availability of the first release candidate of pandas 0.21.0. Please try this RC and report any issues on the pandas issue tracker https://github.com/pandas-dev/pandas/issues/. We will be releasing 0.21.0 final in 1-2 weeks.

This is a major release from 0.20.3 and includes a number of API
changes, deprecations, new features, enhancements, and performance
improvements along with a large number of bug fixes. We recommend that
all users upgrade to this version.